file

#include<iostream>
#include<fstream>
class File
{
public:
	void Display(const char* path)
	{
		std::ifstream in;
		in.open(path);
		if (!in.is_open())
		{
			std::cout << "ERROR";
			in.close();
			exit(1);
		}
		file(in);
		in.close();
	}
	virtual void file(std::ifstream& in)
	{
		std::string str;
		in >> str;
		std::cout << str << std::endl;
	}
};
class ChildFile :public File
{
public:
	virtual void file(std::ifstream& in)override
	{
		std::string str;
		in >> str;
		for (int i = 0; i < str.length(); ++i)
		{
			std::cout << '\"' << str[i] << "\" is " << (int)str[i] << std::endl;
		}
	}
};
class ByteFile:public File
{
public:
	virtual void file(std :: ifstream& in)override
	{
		std::string str;
		in >> str;
		int num;
		for (int i = 0; i < str.length(); ++i)
		{
			//d = str[i];
			//std::cout << '\"'<< str[i]<<"\" is "<< (byte)d<< std::endl;
			int num = (int)str[i];
			for (int y = 8; y > -1; --y)
			{
				std::cout << ((str[i]) & 1);
			}
			std::cout << std::endl;
		}
	}
};

int main()
{
	ByteFile s;
	s.Display("h.txt");
}